Use the web to find out what pencil erasers are made of. Would it be possible to form a new shap

step 1 Hello my dear students we are given here to describe the physical and the structural components

Use the web to find out what pencil erasers are made of....

Key Concepts

Molding and Reprocessing Techniques

The process of melting a polymer and pouring it into a mold is a common manufacturing method known as casting or molding. This concept covers the practical aspects of reprocessing materials, including necessary conditions such as the temperature required to achieve a suitable viscosity, maintaining polymer integrity during heating, and ensuring that the final product exhibits the desired mechanical properties after cooling.

Polymer Composition

This concept involves understanding that many materials, like those used in pencil erasers, are made from polymers which are long chains of repeating molecular units. The specific chemical structure, including types of monomers and any additives, contributes to the overall physical properties of the material, such as flexibility, toughness, and resilience.

Thermal Behavior of Polymers

Polymers exhibit distinct thermal behaviors depending on their chemical structure and degree of cross-linking. Thermoplastic polymers can be softened by heating and hardened upon cooling, making them moldable; in contrast, thermosetting polymers, which are cross-linked during curing, do not melt upon reheating. Understanding these properties is crucial when considering altering the shape of a polymer material through processes like melting and re-molding.

Transcript

Please give Ace some feedback